Bidder has Multiple Sizes in bid.size, but Cannot Use Multi-size Placement IDs with Sizemapping. Here’s How To Fix It.

In order for the Placement ID’s to work with Size Mapping, you’ll need to configure multi-sized Placement IDs according to Size Map.

Troubleshooting

Step 1: If the bidder provides multi-sized Placement IDs, request at least 1 Placement ID for every size map.

For example, AdUnit1 has 3 Size Maps:

ad unit size

Request multi-sized bidder to provide you with 3 Placement ID’s for this ad unit alone. Configure each Placement ID with Bidder sizes that corresponds to the Size Map.

appnexus bids

Step 2: If the bidder provided separate Placement IDs for separate sizes, deploy accordingly:

indexexchange bids

Step 3: If an ad unit will run only on a specific device, still add other devices’ minWidths, but don’t add sizes to it.

Example 1:

A mobile unit will have the following size mapping setup:

ad unit size list

Example 2:

A desktop/tablet unit will have the following size mapping setup:

ad unit size list minimum width

Step 4: Save & publish

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